Meet the most smiley animal on earth: the quokka. A native of Australia, the quokka is a marsupial in the macropod family (along with wallabies and kangaroos) with a permanently positive outlook. Its most distinct characteristic is the appearance that it is always smiling. If you're feeling blue or just having a bad day, look no further. Click through to get an instant mood-booster and learn a few fun facts about quokkas while you're at it!